Daikin GQI-Eco Series, Service Manual

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Troubleshooting by Remote Controller ESIE15-13B
176 Service Diagnosis
4.35 Transmission Error Between Remote Controller and
Indoor Unit
Remote
Controller
Display
U5
Applicable
Models
All models of indoor unit
Method of Error
Detection
The error is generated when the micro-computer detects that the transmission between the
indoor and the outdoor unit is not normal over a certain amount of time.
Error Decision
Conditions
Normal transmission does not continue for specified period.
Supposed
Causes
 Connection of two main remote controllers (when using 2 remote controllers)

Defective remote controller

Defective of indoor unit PCB
 External factor (Noise, etc.)
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Replace the indoor unit PCB, and
then restart.
Replace the remote controller
YES YES
NO
YES
NO
NO
Set one remote controller to "SUB";
turn the power supply off once and
then back on.
NO NO
Replace indoor unit PCB.
YES
Normal
YES
Normal
NO
There is possibility of error caused
by noise. Check the surrounding
area and turn on again.
YES
There is possibility of error caused
by noise. Check the surrounding
area and turn on again.
Using
2-remote controllers
control.
All indoor
PCB micro-computer
monitors blink.
Is it normal?
Is it normal?
SS1 of
both remote controllers
is set to "MAIN."
Operation
returns to normal when
the power is turned off
momentarily.